Direct-current turbo-generator.



No. 886,035. T PATENTED APR.,'28,1908.7

B,A.BEHREND.

DIRECT GURRENT TURBO GENERATOR. APPLIOATIONFILBD 001 31, 1906 Bernard KBJwe/dd UNITED STATES P ENT oEEioE.

BERNARD A. BEHREND, OF XORWOOD, OHIO, ASSIGXOR TO ALLIS-CHALMERS COMPANY, A

CORPORATION OF NEW JERSEY, AND THE BULLOCK ELECTRIC MANUFACTURING COM- PANY. A CORPORATION OF OHIO.

DIRECT-CURRENT TURBO-GENERATOR.

No. 886,035. Specification of Letters Patent. Patented April 28, 1908.

Application filed October 31, 1906. Serial No. 341,377.

device or ring for the commutator, the

To all-whom it may concern:

Be it known that I, BERNARD A. BEHREND, clamping ring supporting and retaining the citizen of the United States, residing at Xorend-ring in position. In the referred form Wood, in the county of Hamilton and State of of my inventionthe clampingrmg is threaded Ohio, have invented certain new and useful externally and is provided with a nut which Improvements in Direct Current Turbobears against the end-ring and thus holds the Generators, of which the following is a full, latter in position. clear, and exact specification. My invention further consists in certain M invention relates to dynamo-electric novel details-of construction and combinamac 111168, and articularly to high-speed tions and arrangements of parts described in machinesof the irect-current type, such as the specification and set fortlrin the apdirect-current turbo-generators. pended claims.

In high-speed rotors, it is necessary to pro, For a better understanding ofmy invenvide means for holding'in position the portion, reference is had to the accompanying tions of the coils which "project beyond the drawings in which 1 core, so that the latter are not displaced or Figure 1 is a partial sectional elevation of distorted by centrifugal action at high-speeds an armature equipped with my invention; of rotation. It has been proposed to surand Fig. 2 is asectlonthrough the commutaround these projecting ortions of the coils tor along the line 22 of Fig. 1. by heavy rings or ban s. When rings are Referring now to the figures of the drawemployed for this purpose it is necessary to ing, 10 represents the shaft on which the providesome means for supporting and cenarmature core 11 and commutator 12 are .75

' tering the rings and for preventing a movemounted. The core consists of laminae ment or displacement thereof axially of the clamped between end-members, one of which machine. j j is shown at 13. The shaft in this case is pro- In direct-current machines, considerable vided with longitudinal grooves or flutes 14 difficulty has been experienced in providing for supplying air to the ventilating ducts15 adequate supporting and protectin means arranged at intervals between the laminae. for the coils at the commutator-en of the The'core carries an armature winding having armature, forthe reason that the commuend portions 16 which project beyond the tator necks 0r leads connecting the coils to ends of the core. The projecting ortions of the commutator render difficult proper su the coils at the commutator end 0 the arma- S5 orting of coil retaining rings. According y ture rest upon a bracket or shoulder 17 exand wires have usually been relied upon for tending outwardly from the end member 13. this urpose. The latter expedient is not The bracket in this case is rovided with an satis actory for all types of machines for the inclined'outer surface and t 1e coils are sepa reason that at high speeds the band wires rated therefrom b suitable insulation .18. I. f are in danger of breaking or becoming loose. The bars 19 of t 1e commutator are held in The main object of my' invention is to roposition by heavy clamping rings in this case -vide means for securely supporting an( reishrink-rings, two of which are shown at 20 taining in. position an end-ring for the ends of and 20 respectively, the shrink-ring 20 bethe coils which project beyond the commuing at the end of the commutator adjacent tator-end of the core. the core. The shrinkrings are separated A further object is to provide an armature from the commutator bars by suitable insulafor high-speed machines which is simple in tion 21. The bars are provided in thisinconstruction and compact and 'able to withstancewith ridges 22 and the shrink-ring 20 stand the enormous stresses at high speeds is provided .at one. side with a suitable rewithout danger of any of its parts being discessed portion'adapted to fit over the ridges placed or injured. 22, so that a movement of the shrink-ring In carrying out my invention I provide an axially away fro nt'he core is prevented. The H end-ring forthe ends of the coils at the comcommutator bars are connected-to the ends mutator-end of the machine, which ring ex of the coils by radial commutator leads or .105 tends inwardly to, or adjacent to, a clamping necks 23.

"shrink-ring 2t).

with ventilating openings 26 forming arms '27.

The inner ends the arms 27 may engage 5 the outer surface of the shrink-ring or 5 there may be a slight clearance between the 5 v tator, a shrink-ring surrounding the connnuarms and shrink-ring if desired. In the present instance the inner ends of the arms rest 1 the ends of the coils and extending inward upon the ring 20 so that the ring 24 is well centered.

nut 28 which engages a notchedor recessed The shrink-ring 20 is threaded externally, atleast tor a portion oi its width, 1 and the threaded portion 1s provided with aportion 29in the inner ends of the arms 27 of the end-ring. evident, is to hold the end-ring 24 in position and to prevent axial.movement thereof. It

is seen that the ridges 22 on the cgnmnutatorbars prevent the shrink-ring 2t) 't'rom being moved along the commutator bars, when the nut 28 is tightened. 'lhe com tiutator bars, if desired, may be provided with slightly inclined seats for the slirinl\'-rin,g it) instead of the ridges 22. In some cases, however, it will be unnecessary to provide special means for preventing movement of the shrink-ring .20, the pressure between the ring and the bars alone being relied upon for this pur use In the latter case the ring 2t) can be placed over the commutator bars from the opposite ends of the commutator, and the commutator necks or leads can therefore be riveted to the bars before the latter are assembled. 'lhe end-ring .24 is separated from the coils by insulation 30, and the commutator necks are separated from the ring 24 and bracket or shoulder 17 respectively by insulation 31 and 32. i

It is seen that l have provided a very rigid structure consisting of a fewparts which are firmly held in position, and that there is no danger whatever of accidental displacement of any of the parts at high speeds of rotation. It is also seen that the protecting ring 24 is well supported, centered and retained in position.

It is apparent that the structure here shown may be modified to a considerable extent without departing from the main purpose of my invention and I aim in my claims to cover-all such modifications.

What I claim as new and desire tosecure by Letters Patent is:

1. In a dynamo-electric machine, an armature core, coils carried thereby, a commu- 'lhe purpose of this iiut, as is t-ator, a clamping device for said commutator, and a protective end-ring surrounding the ends of the coils and extending inward to said clamping device.

In a dynamo-electric machine, an armature core, coils carried thereby. a clamping ring for the commutator bars, an endring surrounding the ends of the coils and extending adjacent said clamping ring, and means on said clamping ring for retaining the end-ring in position.

3. In a dynamo-electric machine, an armature core, coils carried thereby, a commutator, and a protective end-ring surrounding and engaging said shrink-ring.

4. In a dynamo-electric machine, an armature core, coils carried thereby, a commutator ring or bandsurrounding the commu tatoi' bars, an end-rim surrounding the ends of the coils and extending adjacent said commutator ring, and a nut on said commutator ring for retaining the end-ring in position.

In a dynamo-electric machine, an armature core, coils carried thereby, a connnntator. a shrink-ring surrounding the commutator, a protective end-ring surrounding the. ends of the coils and extending inward into engagement. with said shrink-ring, and a nut on said shrink-ring engaging said end-ring to retain the latter in position.

6. In a dynamo-electric machine, an armature core, coils carried thereby, a commutator, a shrink-ringsurrounding the commutator, and a protective end-ring surrounding the ends of the coils and extending inward adjacent said shrink-ring said end-ring having ventilating openings.

7. In a dynamo-electric machine, an armature core, coils carried thereby, a 'comn'iutator, a slwink-ringsurrounding the commutator, a protective end-ring surrounding the ends of the coils, said end-ring having radial arms extending inward to said shrink-ring, and a nut on said shrink-ring engaging the inner ends of the arms.

8.111 a dynamo-electric machine, an armature core, coils carried by said core having their ends projecting beyond the end of the core, a'protective end-ring surrounding the ends of the cells, a commutator, and a clamping device for retaining the commutator bars in place and for preventing a displacement of said end-ring. In testimony whereof I allix my signature, 1n the presence of two witnesses.

BERNARD A. BEHRENI).

Witnesses:

ARTHUR F. Kwls, time. B. SOHLEY. 

